As far as gadgets go, the world completely changed during the 1980s and '90s. Think about it -- we started the '80s without VCRs, and by the end of the '90s, we had tiny cell phones in our pockets. Can you guess which of these iconic gadgets was introduced in which decade?

People often think of virtual reality as a solely recreational pursuit, but doctors and scientists are using the technology in a variety of therapeutic ways, helping people recover from psychological and physical ailments.